EVOLUTION 8" SCT + STARSENSE
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Evolution -the next step in portable telescopes!
Celestron SC telescopes:
Despite the long focal length of these telescopes, the OTA itself has a very short length, making the system a compact telescope which is extremely easy to transport. Light first hits an aspherically figured Schmidt corrector plate and is then thrown onto a spherical main mirror. This reflects the light back up, throwing it onto a secondary mirror which subsequently throws it back in the direction of main mirror. The light then passes through a central hole in the main mirror and into the focuser at the bottom of the OTA. Thus the system is closed and hence does not suffer from air turbulence which could degrade the image. Of course this also means that the system is optimally protected from dust. The Schmidt plate is multi-coated, ensuring bright images which do not suffer from stray light reflections.
This telescope provides a very good image, boasting high contrast and definition and provides a lot of pleasure when planetary observing. The Schmidt-Cassegrain design provides a good all-round system suitable for both observing and astrophotography andwith an enormous range of optional accessories available. Using the bottom end of the OTA to look through means easy orientation. The system is also optimal for occasional terrestrial observing, e.g. birdwatching at close range. Celestron SC telescopes have an aperture ratio of around 1:10 which, so astrophotography is also very easily possible.
Main mirror focusing means a very large range of focus is made available, which allows virtually any common accessory to be used. Two pre-loaded ball bearings are used in the main mirror focus positioning mechanism in order to prevent 'mirror shift' - a typical problem when using simple bushings. The use of high quality materials such as CNC-milled aluminium components, cast steel and stainless steel guarantees extreme robustness with low weight. This means that a very heavy mount is unnecessary, not always the case for other telescope designs.
Features of these telescopes:
|Type of build||Schmidt-Cassegrain|
|Limit value (mag)||13,3|
|Focal length (mm)||2032|
|Max. useful magnification||400|
|Light gathering capacity||840|
|Tube length (mm)||430|
|Secondary mirror obstruction||31,5|
|Connection ( to eyepiece)||1,25"|
|Type of build||SC thread|
|Tracking speeds||sideral, solar and lunar|
|Alignment method||SkyAlign, 3-Star Align, Solar System Align|
|GoTo Language||german, english, french, spanish, italian, russian|
|Type of construction||Dreibein|
|Deviating optics||1.25", 90° star diagonal|
|Finder scope||Red dot finder|
|1.25'' eyepieces||13mm, 40mm|
|Total weight (kg)||18,4|
StarSense AutoAlign: The most exciting new development for many years - this technique has revolutionized amateur astronomy!
'SkyProdigy' technology for retrofitting to almost any Celestron GoTo telescope! For alt-azimuth mounted telescopes it allows alignment without GPS, without having to enter coordinates, without having to align with the North Pole and to level, and without the hassle of having to use alignment stars. The telescope is ready to use in just three minutes - without the user needing to input anything, and without any prior knowledge of stars or astronomy required. Just turn it on, wait 3 minutes and you can slew to any visible celestial object at the push of a button!
The secret of the StarSense technology is a small camera module which is mounted on the telescope and functions as a finder. It takes 3 wide angle photos of different areas of the sky and the StarSense hand controller then analyzes these photos and calculates the position of other objects in the night sky. This so-called professional 'plate solving' technology has been brought onto the market by Celestron and made available to amateur astronomers at an affordable price for the first time.
The StarSense module is part of the StarSense hand controller, both of which are included in the price. The system is also updateable: the lens in the StarSense camera is removable, it has a USB port and the firmware is upgradeable. Celestron is working on producing camera accessories for using StarSense also for auto-guiding and wide-angle photography. This will save the expense of having to purchase additional accessories. The StarSense module can be used with almost all GoTo alt-azimuth and equatorial mounts from the last 10 years. The StarSense module has a lot of advantages when used with equatorial mounts. Although polar alignment is still required, this can be carried out in just a few minutes using the new Celestron 'AllStar' procedure, which can use any star! Simply enter location and time, select and find a star from the database, bring it into the centre of the crosshairs, using the azimuth and elevation adjustments, and you have finished! StarSense then employs its fully automatic '3-minute plate solving procedure' for establishing the precise orientation, without any additional input from the user required, as for alt-azimuth mounts. The complicated, tedious finding and centering of guide stars is no longer required. Another advantage of StarSense is an extreme improvement in the positioning accuracy by the T-point procedure.
In a similar way to some high-end mounts, many stars can be 'mapped', i.e. positioned exactly in the center of the crosshairs and the exact location confirmed with 'Enter'. Using 10 mapped stars (which should be distributed as widely as possible over the entire visible part of the sky), positioning accuracy is extremely good.